Automatic wagon-brake



(No, Model.) 2 Sheets-Sheet l.

D. OLTMANNS.

AUTOMATIC WAGON BRAKE.

No. 323,521. Patented Augi l1.1. 1885L M4/5555.' Y Q l A V I r N. PETERS Pmlo-Lhhugnpher, Walhxnglon. (1C

(No Model.) D OLTMANNS 2 Sheets-Sheet 2.

AUTOMATIC WAGON BRAKE.

Patented Aug., 4, 1885.

n 91M MIM UNITED STATES PATENT EEICE.

DIEDRIcII'oLTMANNs, AoF soufre BEND, INDIANA.

AUTOMATIC WAGONBRAKE.

SPECIFICATION forming part of Letters Patent No. 323,521, dated August 4, 1885. Application filcd March 10, 1.885. (No model.)

To a/Zi whom t may concern:

Be it known that I, DIEDRICH OLTMANNs, of South Bend, in the county of St. Joseph and State of Indiana, have invented certain new and useful Improvements in Automatic Vagoli-Brakes; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon,which forni part of this specification, in which- Figure l is a plan view of my improved wagoubralre. Fig. 2 is a section taken longitudinally and vertically through the center of the running-gear, showing the devices by which the brake-bar is connected to the body of the wagon. Fig. 3 is a perspective view of the front hounds and tongue slotted as hereinafter described 5 and Fig. 4 is a modiiica` tion, showing the brake bar connected with the reach by devices which actuate the former.

The object of the invention is to provide an automatic wagonbrake adapted to be actuated by the gravity of the load in the wagon-body with or without the aid ofthe horses in back' ing.

The invention consists in the construction and novel arrangement of parts hereinafter described, and pointed out in theV appended claims.

Referring to the accompanying drawings by letters, A A designate the rear wheels, and A A the front wheels, of a wagon, of which B is the rear axle and B the front axle, respectively.

G is the bolster secured to the rear axlc,and provided at its ends with the upright-s a c to prevent lateral displacement of the rear end of the wagon-body A2. On the bolster C is a long roller, D D, having end bearings and a central bearing in the three blocks b b b, secured to the bolster. The object of the said roller is to sustain the rear end of the wagonbody and permit the same to move freely 1ongitudinall y.

G is the bolster connected to the front axle by thehing-bolt b,whieh connects the reach E thereto, as shown. IThe front end of the wagon-body A'Zis secured to the front bolster, G, aud turns therewith.

E is the reach, having its front end passing through and free to move in an opening, b2,

made centrally between the meeting surfaces of the rear bolster and axle.

H H are the rear hounds, having their front ends secured to a sheath, H', adapted to slide upon the reach E.

B2 B2 are the front hounds secured to the front axle and having their front ends secured to the tongue F by the horizontal transverse bolt f, which passes through said ends and through a longitudinal slot, f2, made in the tongue, so that the latter has a certain amount of longitudinal motion on the hounds.

G is the brake-bar,which crosses the reach transversely andlies upon the sheath H. The brake-bar is adapted to slide forward and backward on the sheath, its motion being limited by the long staple H2, which rises from the reach and straddles both the brake-bar and sheath H'. The brake-barV is prevented from end motion by the pins 71.- h, which rise from its upper surface on eachV side of the staple.

E is a long loop, having its ends on each side of the reach secured to the sheath H,and passing through the vertical loop f', secured to the rear end of the tongue. By means of the said loops the tongue and sheath H are flexibly connected together.

rIhe brake-bar is provided with the brakeshoes G G',.adapted to bear against the wheels A A. It is also provided at equal distances on each side of its center with eye-plates c c, to which the front ends of the rods d d are attached.

- c c are eyeplates similar to and situated inward from the eye-plates c c, and serving a purpose hereinafter explained.

n The rear ends of the rods d d are pivotally attached to the outer arms of levers I I, which have their fulcrums at 'i t' upon the hounds H H. The inner arms of the levers I Ihave pivotally attached to them the rear ends of the rods d d', the front ends of which are pivotcd on the ends ofthe transverse plate (I. The said plate is attached to the bottoni of the wagonbody A2, the attachment being by a central p/ivoth, to allow freedom of motion to the rods d d Fig. 4 shows a Inediti cation in which the rods d d are shortened, and haveV their front ends pivotcd on the reach by a pin, J.

t" `i and i2 i* are holes through the levers I I,

.TOO

to adjust the ends'of the rods d d in different positions thereon. By means of the holes z" t the leverage ofthe outer arms of the levers is shortened.

It is evident from the foregoing description that the front axle, front hounds, reach, and body have no longitudinal motion independent of each other, that the said parts can move together longitudinally on the rear axle and hounds, the reach sliding through the sheath H and opening b2, and that the brake-bar has an independent motion on the sheath longitudinally to the reach.

The operation of the invent-ion is then as follows: In descending a hill the load in the Wagon-body will cause the latter to slide over the roller D D, drawing the reach forward through the sheath H, and advancing` the plate J with reference to the levers I. The rods cl will consequently dra-W the inner arms of said leve-rs forward and turn the outer arms backward. The latter arms will, by means ofthe rods d', draw the brake-bar backward on the sheath H and bind the shoes G against the wheels A. The heavier the load with more force of momentum the wagon-body will be slid forward and the firmer the shoes will bind o'n the wheels. The staple I-I2 limits both the sheath H and the brake-bar in their motion. The tongue having a longitudinal motion on the front hounds will, when the horses back, press back the'loop E', and consequently the sheath H on the reach, and will aid in braking, as is easily understood.

By connecting the eye-plates c and the holes i? on the inner arms of the levers I the brake will act when vascending a hill, because the wagon-body and plate J will then slip backward, and the rods d and d will actin thesalne direction, carrying the brake bar and shoes backward.

lVhen on-level ground, the pull of the horses on the tongue will, by means of the loops f and E', reverse the described motion and take the brake-shoes from the wheels. The roller D D may be placed on the front bolster. The loop E is then omitted and the rods d attached to the eye-plates c and holes 2, and the wagonbody attached to the rear bolster. The brake will then act on descending a hill.

Having described my invention, I claim l. In a wagon-brake, the combination of the body A2, axle B', and reach E with the axle B, carrying the` roller D D on its bolster, hounds H H, provided with the sheath H', brake-bar G, provided with shoes G G', rods d, levers I, and rods d', connected attheir front ends either to the wagon-body or to the reach., substantially as specied.

2. In a wagon-brake, the combination of the axles B B, body A2, reach E, roller D D, hounds B2 B2, and brake-bar Gr, actuated by the motion of the load of the hounds H H, provided with the sheath H', loops E and f', tongue F, provided with the slot f, and bolt f2, substantially as specified.

3. The combination,in a wagon-brake,of the longitudinally-movable reach E, rear hounds, H H, and brake-bar G with the long sheath H and pins h h, substantially as specified.

In testimony that I claim the foregoing as my ownIaix my signature in presence of two witnesses.

DIEDRICH OLTMANNS.

Vitnesses:

.Timms DUsHANE, J OHNN SARs. 

